<script setup>
import { User, Lock } from '@element-plus/icons-vue'
import { ref } from 'vue'
import { ElMessage } from 'element-plus'

//控制注册与登录表单的显示， 默认显示注册
const isRegister = ref(false)
//定义数据模型
const registerDate = ref({
    userName:'',
    password:'',
    rePassword:''
})

//校验密码
const checkRePassword = (rule, value, callback)=>{
    if(value === ''){
        callback(new Error('请再次确认密码'))
    }else if(value !== registerDate.value.password){
        callback(new Error('请确保两次密码输入一致'))
    }else{
        callback()
    }
}

//校验
const rules = ref({
    userName:[
        {required: true, message: '用户名不能为空', trigger: 'blur'},
        {min: 3, max: 20, message: '用户名长度必须在3-20位非空字符', trigger: 'blur'}
    ],
    password:[
        {required: true, message: '密码不能为空', trigger: 'blur'},
        {min: 6, max: 20, message: '密码长度必须在6-20位非空字符', trigger: 'blur'}
    ],
    rePassword:[
        {validator: checkRePassword, trigger: "blur"}
    ]
})

//调用后台接口完成注册
import {userRegisterService,userLoginService} from '@/api/user.js'
const formRef = ref(null)

const register = async()=>{
    try{
        // 验证表单
        await formRef.value.validate()
        
        // 验证通过
        let result = await userRegisterService(registerDate.value);
        if(result.code === 0){
            ElMessage.success('注册成功');
        }else{
            ElMessage.error('注册失败，该用户可能已存在'); 
        }
    }catch(error){
        if(error?.errors) {
            // 验证错误
            ElMessage.warning('请正确填写表单');
        } else {
            // 其他错误
            ElMessage.error('注册请求失败，请稍后重试'); 
            console.error('注册接口请求异常:', error);
        }
    }
}

//调用登录接口完成登录
import { useRouter } from 'vue-router'
import { useTokenStore } from '@/stores/token'
const router = useRouter()
const tokenStore = useTokenStore();
const login = async()=>{
    let result = await userLoginService(registerDate.value);
    if(result.code === 0){
        ElMessage.success('登录成功');
        //获取token
        tokenStore.setToken(result.data)
        router.push('/')
    }else{
        ElMessage.error('登录失败'); 
    }
}

//清除信息
const clearData = ()=>{
    registerDate.value={
        userName:'',
        password:'',
        rePassword:''
    }
}
</script>

<template>
    <el-row class="login-page">
        <el-col :span="12" class="bg"></el-col>
        <el-col :span="6" :offset="3" class="form">
            <!-- 注册表单 -->
            <el-form ref="formRef" size="large" autocomplete="off" v-if="isRegister" :model ="registerDate" :rules="rules">
                <el-form-item>
                    <h1>注册</h1>
                </el-form-item>
                <el-form-item prop="userName">
                    <el-input :prefix-icon="User" placeholder="请输入用户名" v-model="registerDate.userName"></el-input>
                </el-form-item>
                <el-form-item prop="password">
                    <el-input :prefix-icon="Lock" type="password" placeholder="请输入密码" v-model="registerDate.password"></el-input>
                </el-form-item>
                <el-form-item prop="rePassword">
                    <el-input :prefix-icon="Lock" type="password" placeholder="请再次输入密码" v-model="registerDate.rePassword"></el-input>
                </el-form-item>
                <!-- 注册按钮 -->
                <el-form-item>
                    <el-button class="button" type="primary" auto-insert-space @click="register">
                        注册
                    </el-button>
                </el-form-item>
                <el-form-item class="flex">
                    <el-link type="info" :underline="false" @click="isRegister = false; clearData()">
                        ← 返回
                    </el-link>
                </el-form-item>
            </el-form>
            <!-- 登录表单 -->
            <el-form ref="form" size="large" autocomplete="off" v-else :model="registerDate">
                <el-form-item>
                    <h1>登录</h1>
                </el-form-item>
                <el-form-item prop="userName">
                    <el-input :prefix-icon="User" placeholder="请输入用户名" v-model="registerDate.userName"></el-input>
                </el-form-item>
                <el-form-item prop="password">
                    <el-input name="password" :prefix-icon="Lock" type="password" placeholder="请输入密码" v-model="registerDate.password"></el-input>
                </el-form-item>
                <!-- 登录按钮 -->
                <el-form-item>
                    <el-button class="button" type="primary" auto-insert-space @click="login">登录</el-button>
                </el-form-item>
                <el-form-item class="flex">
                    <el-link type="info" :underline="false" @click="isRegister = true; clearData()">
                        注册 →
                    </el-link>
                </el-form-item>
            </el-form>
        </el-col>
    </el-row>
</template>

<style lang="scss" scoped>
/* 样式 */
.login-page {
    height: 100vh;
    background-color: #fff;

    .bg {
        background: url('@/assets/Login.png') no-repeat center / cover;
        border-radius: 0 20px 20px 0;
    }

    .form {
        display: flex;
        flex-direction: column;
        justify-content: center;
        user-select: none;

        .title {
            margin: 0 auto;
        }

        .button {
            width: 100%;
        }

        .flex {
            width: 100%;
            display: flex;
            justify-content: space-between;
        }
    }
}
</style>